Asus Crosshair II Formula User Manual - Page 48

Primary PCI Express x16 slots, Universal PCI Express x16 slots max. x8 mode

Page 48 highlights

Primary PCI Express x16 slots The primary PCI Express x16 slots support PCI Express x16 graphics cards that comply with the PCI Express specifications. Universal PCI Express x16 slots (max. x8 mode) This motherboard also supports universal PCI Express x16 slots with a maximum speed of 8 GB/s. The operating frequency of this slot changes, depending on the type of PCI Express card you install. Refer to the table below for details. VGA configuration Single VGA/PCIe card Dual VGA/PCIe card Triple VGA/PCIe card PCI Express operating mode PCIex16_1 PCIex16_2 PCIex16_3 x16 x8 x16 x16 N/A x16 x16 x8 x8 When running 3-Way SLI™ mode, the PCIe operating frequency will reach x8, x8, x8. • We recommend that you install a VGA card to the primary (blue) PCI Express x16 slots, and install any other PCI Express device to the universal (white) PCI Express x16 slot. • Currently, only NVIDIA® SLI™-Ready GeForce® 8800 Ultra and GeForce® 8800 GTX graphics cards support 3-Way SLI™ mode. • 3-Way SLI™ mode is supported by Windows® Vista OS only. For more information, go to NVIDIA® official website (www.nvidia.com). • Currently, only NVIDIA® GeForce® 8500 GT and GeForce® 8400 GS graphics cards support GeForce Boost function under Hybrid SLI™ mode. • Currently, only NVIDIA® GeForce® 9800 GX2 and GeForce® 9800 GTX graphics cards support Hybrid Power function under Hybrid SLI™ mode. • Hybrid SLI™ mode is supported by Windows® Vista OS only. For more information, go to www.nvidia.com/hybridsli. • Before enabling the HybridPower™ function, ensure that you have connected your display to the onboard VGA port or the HDMI/DVI port at the rear panel. Refer to 2.8.1 Rear panel connectors for details. • Connect a rear chassis fan to the motherboard connector labeled OPT_FAN1/2 when using multiple graphics cards for better thermal environment. See page 2-32 for details. • We recommend that you provide sufficient power when running NVIDIA® SLI™ mode. See page 2-34 for details. 2-22 Chapter 2: Hardware information

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2-22
Chapter 2: Hardware information
We recommend that you install a VGA card to the primary (blue) PCI
Express x16 slots, and install any other PCI Express device to the universal
(white) PCI Express x16 slot.
Currently, only NVIDIA
®
SLI™-Ready
GeForce
®
8800 Ultra
and
GeForce
®
8800 GTX
graphics cards support 3-Way SLI™ mode.
3-Way SLI™ mode is supported by Windows
®
Vista OS only. For more
information, go to NVIDIA
®
official website (www.nvidia.com).
Currently, only NVIDIA
®
GeForce
®
8500 GT
and
GeForce
®
8400 GS
graphics cards support GeForce Boost function under Hybrid SLI™ mode.
Currently, only NVIDIA
®
GeForce
®
9800 GX2
and
GeForce
®
9800 GTX
graphics cards support Hybrid Power function under Hybrid SLI™ mode.
Hybrid SLI™ mode is supported by Windows
®
Vista OS only. For more
information, go to www.nvidia.com/hybridsli.
Before enabling the HybridPower™ function, ensure that you have
connected your display to the onboard VGA port or the HDMI/DVI port at
the rear panel. Refer to
2.8.1 Rear panel connectors
for details.
Connect a rear chassis fan to the motherboard connector labeled
OPT_FAN1/2 when using multiple graphics cards for better thermal
environment. See page 2-32 for details.
We recommend that you provide sufficient power when running NVIDIA
®
SLI™ mode. See page 2-34 for details.
Primary PCI Express x16 slots
The primary PCI Express x16 slots support PCI Express x16 graphics cards that
comply with the PCI ±xpress specifications.
Universal PCI Express x16 slots (max. x8 mode)
This motherboard also supports universal PCI Express x16 slots with a maximum
speed of 8 GB/s. The operating frequency of this slot changes, depending on the
type of PCI Express card you install. Refer to the table below for details.
VGA configuration
PCI Express operating mode
PCIex16_1
PCIex16_2
PCIex16_3
Single VGA/PCIe card
x16
x8
x16
Dual VGA/PCIe card
x16
N/A
x16
Triple VGA/PCIe card
x16
x8
x8
When running 3-Way SLI™ mode, the PCIe operating frequency will reach x8,
x8, x8.